refactor: add and use parseDate (#1643)

* refactor: add and use `parseDate`

* style: use proper spelling

Co-authored-by: appgurueu <34514239+appgurueu@users.noreply.github.com>

---------

Co-authored-by: appgurueu <34514239+appgurueu@users.noreply.github.com>

Timing-Functions/ParseDate.js

@@ -0,0 +1,27 @@
+import { getMonthDays } from './GetMonthDays'
+
+function checkDate(date) {
+  if (date.day < 1 || date.day > getMonthDays(date.month, date.year)) {
+    throw new Error('Invalid day value.')
+  }
+}
+
+function parseDate(dateString) {
+  const regex = /^(\d{1,2})\/(\d{1,2})\/(\d{4})$/
+
+  const match = dateString.match(regex)
+
+  if (!match) {
+    throw new Error("Invalid date format. Please use 'dd/mm/yyyy'.")
+  }
+
+  const res = {
+    day: parseInt(match[1], 10),
+    month: parseInt(match[2], 10),
+    year: parseInt(match[3], 10)
+  }
+  checkDate(res)
+  return res
+}
+
+export { parseDate }

Timing-Functions/test/ParseDate.test.js

@@ -0,0 +1,40 @@
+import { parseDate } from '../ParseDate'
+
+describe('parseDate', () => {
+  it.each([
+    ['18/03/2024', { year: 2024, month: 3, day: 18 }],
+    ['29/02/2024', { year: 2024, month: 2, day: 29 }],
+    ['28/02/2023', { year: 2023, month: 2, day: 28 }],
+    ['01/12/2024', { year: 2024, month: 12, day: 1 }],
+    ['1/12/2024', { year: 2024, month: 12, day: 1 }],
+    ['10/1/2024', { year: 2024, month: 1, day: 10 }]
+  ])('Returns correct output for %s', (dateString, expected) => {
+    expect(parseDate(dateString)).toStrictEqual(expected)
+  })
+
+  it.each([
+    '18-03-2024',
+    '18.03.2024',
+    '03/2024',
+    '01/02/03/2024',
+    '123/03/2024'
+  ])('Throws for %s', (wrongDateString) => {
+    expect(() => {
+      parseDate(wrongDateString)
+    }).toThrow()
+  })
+
+  it.each([
+    '40/03/2024',
+    '30/02/2024',
+    '29/02/2023',
+    '31/04/2023',
+    '00/01/2024',
+    '01/00/2024',
+    '01/13/2024'
+  ])('Throws for %s', (wrongDateString) => {
+    expect(() => {
+      parseDate(wrongDateString)
+    }).toThrow()
+  })
+})